#include <bits/stdc++.h>
using namespace std;
// #include <atcoder/all>
// using namespace atcoder;

using ll = long long;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;cin>>n;
    vector<char>ans;
    while(n!=1){
        if(n%2==1) {n--;n/=2; ans.push_back('A');}
        if(n%3==1){n--;n/=3; ans.push_back('B');}
    }
    reverse(ans.begin(),ans.end());
    for(auto x:ans) cout << x;
}